纤维细胞通过定义的因素直接重新编程成功能性心肌细胞
Masaki Ieda1, Ji-Dong Fu, Paul Delgado-Olguin
1Gladstone Institute of Cardiovascular Disease, University of California, San Francisco, San Francisco, CA 94158, USA. ieda@cpnet.med.keio.ac.jp
Cell
|August 10, 2010
概括
科学家利用三个关键因素直接将纤维细胞重新编程成心肌细胞样细胞. 这种直接的心脏重编程绕过干细胞,为再生医学提供了潜在的新来源.
科学领域:
- 心血管生物学 心血管生物学
- 干细胞生物学 干细胞生物学
- 再生医学是一种再生医学.
背景情况:
- 诱导多能干细胞 (iPSCs) 为细胞重编程提供了一条途径.
- 在没有干细胞中间体的情况下,直接将体细胞重新编程为替代命运是可取的.
- 产后的心脏中含有丰富的纤维细胞,但对于直接心脏重编程的主调节器是未知的.
研究的目的:
- 研究纤维细胞直接重新编程成心肌细胞样细胞.
- 确定能够直接进行心脏重编程的因素.
- 评估这种方法在再生心脏病学中的潜力.
主要方法:
- 使用了三个发育转录因子的组合:Gata4,Mef2c和Tbx5.5.
- 用这些因素转化产后心脏或皮肤纤维细胞.
- 将移植的转纤维细胞移植到小鼠心脏中,以评估体内分化.
主要成果:
- 实现了纤维细胞的快速和有效的直接重编程,使其变成类似心肌细胞的细胞.
- 诱导的心肌细胞表达了心脏特异性标记物,并表现出自发收缩.
- 移植的纤维细胞在小鼠心脏环境中分化为类似心肌细胞的细胞.
结论:
- 证明了功能性心肌细胞可以通过使用定义的因子从差异化体细胞直接重新编程.
- 直接心脏重编程提供了一个潜在的策略,可以在没有iPSC阶段的情况下产生心肌细胞.
- 这种方法可能为心脏再生疗法提供心肌细胞的新来源.
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